clamps. This silicone hose is quite soft so a SS liner is needed in the

hose

clamp to prevent the hose from extruding through the worm gear slots.
The constant torque feature means the clamp can expand and contract
slightly as the aluminum hose barb expands and contracts when
it warms up and cools down. The washers are actually Belleville springs
back to back. The Breeze part number is CT-200L.
McMaster Carr part #5281K-17.  I bought a box of ten for about $34.

Al Gietzen wrote:

Just a suggestion - if you're clamping so tight as to extrude the silicon
through the slots; you are likely clamping too tight.  Over tightening
damages the hose and can result in premature failure.  Using double

clamps,

or wider band clamps (like 5/8" wide, or more) to spread the clamping

force

over a larger area is a good idea.

It is important that the tube your are connecting to at both ends cannot
move apart.  With 25 psi pressure, on a 1-1/2 line, there is about a 45 lb
force trying to push things apart.

Al

That silicone is REAL soft Al. Get some and try it?
The clamps I recommend above are 5/8" wide.
Good point on the separating force. 30 PSI is 53 pounds.

Paul Lamar
 --------

Paul;

I have some.  I used the 3-ply reinforced silicone coolant hose for the
larger diameter, and the single ply nylon reinforced silicone heater hose
for, you guessed it, the heater hose.
 I found the single ply to be quite soft, but my impression of the 3-ply was
that it is quite firm and very strong.

I have 9/16 standard worm drive clamps on that I had on hand for testing,
but intend to get 5/8" clamps before I fly, and will probably go with the
Breeze clamps you suggest.  I didn't leave room for double clamps, but I
don't think it necessary with the rigid plumbing that can't really go
anywhere.

Al

Looks like the same hose I have. Did not see the ply mentioned but I must
have the single ply hose because it is so soft. You do nice work AL.

Now if I could only find some 1-1/2 inch dia tubing bends around .050 wall.
Ed Klepies turned me on to a place that had cheap tubing bends but the walls were
too thick to bead easily. I could get a bunch made if enough of you needed
some.

Paul Lamar
 
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